fix(polish): 订单购物车论坛粉边软化 + 论坛付费帖购链路

- 购物车/商品/论坛表面复用 #77 soft recipe（mix 边 + soft ring）
- 论坛 visibility=pay：订单 resource + 余额扣费闭环
- VIP 价/免费解锁 + 购买 CTA/AJAX，复用现有 Order/Credits

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

assets/css/routes/cart.css

@@ -389,3 +389,12 @@
   gap: 12px;
   padding-top: 8px;
 }
+
+/* Soft focus ring (#77 recipe) — avoid hard primary stroke */
+.aksrt-cart-page__input:focus,
+.aksrt-cart-page__textarea:focus,
+.aksrt-cart-page__qty-btn:focus-visible {
+  outline: none;
+  border-color: color-mix(in srgb, var(--color-primary) 45%, var(--color-line, #e5e7eb));
+  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 18%, transparent);
+}

assets/css/routes/commerce.css

@@ -43,13 +43,13 @@
 
 .aksrt-commerce-header__nav-item:hover {
   color: var(--color-primary, #f04494);
-  border-color: color-mix(in srgb, var(--color-primary, #f04494) 35%, transparent);
+  border-color: color-mix(in srgb, var(--color-primary, #f04494) 45%, transparent);
 }
 
 .aksrt-commerce-header__nav-item.is-active {
   color: var(--color-on-primary, #fff);
   background: var(--color-primary, #f04494);
-  border-color: var(--color-primary, #f04494);
+  border-color: transparent;
 }
 
 /* Soften revenue dashboard cards — task-first, not ops console */

assets/css/routes/product.css

@@ -100,7 +100,7 @@
 
 .aksrt-product-page__thumb:hover,
 .aksrt-product-page__thumb.is-active {
-  border-color: var(--color-primary);
+  border-color: color-mix(in srgb, var(--color-primary) 45%, var(--color-line, #e5e7eb));
 }
 
 .aksrt-product-page__thumb img {
@@ -227,8 +227,8 @@
 .aksrt-product-editor__input:focus,
 .aksrt-product-editor__textarea:focus {
   outline: none;
-  border-color: var(--color-primary);
-  box-shadow: 0 0 0 3px var(--color-primary-soft);
+  border-color: color-mix(in srgb, var(--color-primary) 45%, var(--color-line, #e5e7eb));
+  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 18%, transparent);
 }
 
 /* ===== Quantity controls ===== */
@@ -244,7 +244,7 @@
 }
 
 .aksrt-product-page__qty-btn:hover {
-  border-color: var(--color-primary);
+  border-color: color-mix(in srgb, var(--color-primary) 45%, var(--color-line, #e5e7eb));
   background: var(--color-primary-softer);
 }
 
@@ -425,13 +425,13 @@ html.dark .aksrt-product-page__content img {
 }
 
 .aksrt-product-page__spec-btn:hover {
-  border-color: var(--color-primary);
+  border-color: color-mix(in srgb, var(--color-primary) 45%, var(--color-line, #e5e7eb));
   color: var(--color-primary);
 }
 
 .aksrt-product-page__spec-btn.is-active {
   background: var(--color-primary-soft);
-  border-color: var(--color-primary);
+  border-color: color-mix(in srgb, var(--color-primary) 45%, var(--color-line, #e5e7eb));
   color: var(--color-primary);
   font-weight: 600;
 }